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Very strange. Does this only happen with the Grand Lady D?Perhaps try removing that particular sound, then re-uploading?

I have not had any contact with Pablo, but by all accounts he's an absolute superstar among US Nord owners. If re-uploading the sound does not fix the issue, I'd definite follow Dave's suggestion and drop him a line.

James, unfortunately, I cannot reproduce this at will. A couple of times I remember leaving the piano on and it sounded like this. So did my kids hit some combination of buttons that caused it? I don't really know.

So I often play Grand Lady D and so it has ended up with this occurring on that patch.

I am concerned since it has happened 4 times already (a few days apart).

I believe the sound you hear is perfectly normal. You can hear something similar on just about any acoustic piano and on some DPs. For example, our Steinway Grand and FP-7F both produce a similar sound (amount of sound is adjustable on the FP-7F). If you're interested, I can try to record it and give you a link.

Here is my theory on how the sound is produced (on an AP): When the damper pedal is up, the dampers press against the strings and actually displace the strings downward slightly. If the damper pedal is depressed rapidly, the dampers pull away from the depressed strings, which then are launched into vibration, producing the characteristic sound of all of the damped strings being excited simultaneously. How much sound is produced is strongly influenced by how rapidly the dampler pedal is pressed down - if pressed down slowly, the strings stay in contact with the damper so they are unable to vibrate freely.

I hope this clears things up for you. It should be a happy ending, because what you thought was a problem is actually an indication of how faithful the Nord is in reproducing one of the AP's nuances. I doubt that you will hear the same effect on anything but an AP type patch.

Bob, i don't think so. This is VERY loud as you heard. It sounds the same regardless of how hard I hit the pedals. And it resets to normal when I change patch. I did not increase the volume to demonstrate this. This is not a possible behavior on an acoustic.

You said, "changing the Patch sound restores it back to normal." Could you please clarify? Does it make this noise on any patch other than the Grand Lady D patch? Does the Grand Lady D patch sound OK under some conditions?

You said, "changing the Patch sound restores it back to normal." Could you please clarify? Does it make this noise on any patch other than the Grand Lady D patch? Does the Grand Lady D patch sound OK under some conditions?

The extraneous sound is not something consistent. Comes and goes. Like I said, it's a software bug. Changing to a different piano sound restores it back to normal.

I've only heard it on Grand Lady D but that doesn't mean anything since I'm on this patch most of the time.

I believe the sound you hear is perfectly normal. You can hear something similar on just about any acoustic piano and on some DPs. For example, our Steinway Grand and FP-7F both produce a similar sound (amount of sound is adjustable on the FP-7F). If you're interested, I can try to record it and give you a link.

Here is my theory on how the sound is produced (on an AP): When the damper pedal is up, the dampers press against the strings and actually displace the strings downward slightly. If the damper pedal is depressed rapidly, the dampers pull away from the depressed strings, which then are launched into vibration, producing the characteristic sound of all of the damped strings being excited simultaneously. How much sound is produced is strongly influenced by how rapidly the dampler pedal is pressed down - if pressed down slowly, the strings stay in contact with the damper so they are unable to vibrate freely.

I hope this clears things up for you. It should be a happy ending, because what you thought was a problem is actually an indication of how faithful the Nord is in reproducing one of the AP's nuances. I doubt that you will hear the same effect on anything but an AP type patch.

Got in touch with Pablo (thanks Dave) on this issue and he definitely does not agree with bbent that this is connected.

The damper sound is present normally (when this problem is absent) and it sounds like normal damper noise (and string resonance), not a whinny sound that sounds like I'm playing violin. Damper noise is also very soft.

First of all the seriousness of the attention given to me by Pablo and now even Stockholm has been amazing.

The problem as I have documented it is not known here in the US. Apparently though, the bug that I've shown has occurred on the Nord Stage 2 and seems to happen (per Stockholm) when the board is left powered on for long periods (days).

My understanding is that this was previously fixed in the NS2 OS and they're intending to put this fix also on the NP88 OS.

So again to confirm, the problem has occurred for me when I left the power on the board overnight. This was true in all the cases when it happened. Apparently, I left it on at least once a week lately. This however clears up the possibility that this might occur on a gig and my concern has dropped significantly.